Superheater header



NOV. 3, 1931. VQLLAND 1,829,882

SUPERHEATER HEADER Filed May 11. 1929 4 Sheets-Sheet l 0/ \O I o o 7 IN VEN TOR.

/ Karl Val/and ATTORNEY;

Nov. 3, 1931. K. VOLLAND 1,829,882

SUPERHEATER HEADER Filed May 11. 1929 4 Sheets-Sheet 2 raw , T TORNE Y.

necessary to securewsa idiendsr: M

Patented Nov. '3, 93 1 mn'rvotmnn, ortcessni lam; 'AssIeNoR mnnesnznnmrm comm e c ,orcnnwi yonx nhz v i stirnnnmrm "HEADER ApplicationhmdIiyfli;1929; Seria1= 1q'o.

f subjectf-nfatterrof;thiszinventionf@issa -slrperheater consistingof:tworseparate parts. Superheaters ofi'thiiskirid have the: advantage that they canbereadflyyfabricated :as simple castin'gs'oor in semeiother mannerand that by doingso strains fromr-castingi-andfromtern- --p erature difi'erenc'esz areia-voidedz Eand Fthat *111, v addition'ran interchange of heat between *the rchamber.:"containing; the superheated stea-ni andthe-ronecontaining-thesaturatedsteam1s "avoided.

v 1.011: accountnofiitsl-peculiar; form a -isteain :h'eader: madesin .accordancee'with this-inveniti01rhas additional important advantages in? asm uch as it may be used bothrfor siipersu perhea-tersi-n nOrma-Rdiametered:flues. -Incaseswhere-therfluesareofenlarged did -anieters 10f thefines ftherspacerbetween" aidjas II'r thecaseofsuperheatersvlocatedfiniflues of- .n'ormal "diameter especially: "Where th'e zboilerris-de'signed for-higlrratings and,-? therelines, care niust betakerr'torkeep the elements foreg-issequipped for iaklarge niimber ofsuch as: simple as possiblea'nda toi keep the number of joints and clamps assmall'as possiblezsince 1 it is diflicult to find space on thew'hieaders for sthe" large: number riot 1superheater :element ends; f In taddition', ca remust Lbe; exercised, "-that wi-ththeevery largenumber-of thex-supelw the-dimensions: of I'the steam eheadersdo :not

;' tobeI-inereased.

header in accordance with the present inven- These fdiiiicu-lties iarewobwiaited2 steam tion is used, this being accomplishecltbyggivchamber is therefore,

rip f nne T- and sse'tsscrewsewhich 4 oniadjacentiwallsoftheechambersiiheater I elements oi -1nazsingleplane, one

and-the-ends of these: groups canbe secured 1 tothelowems'ide OifirhhHStGfLIfl: header "in such 362,168;'an1 in Germany Jiine 23," 1928 'ingtothexsteam headersa'middlechamberand I of, these-two :late'ral -.chfambers-:may be-accoma plishediby means of bridging pieceswhich are eitherunitary-with the lateralflchail-bers or are fabricated separately and subsequently connected? to 1 these: chambers. The central necting. pieces;

Accordingitolone formoi the invention'zthe latter chambersiaresoshaped thatthey form a frame-like structure: which: surrounds -=tl1e 7 center lcharnber andall .four. sides; *With this form of theouterchambers: the: possihilityeis presentedwtoesecure the-inner; chamber with theio uter frame-likerchambereima verytsimissd'one by .meansoii wedges iactioneflanges formed Imthetcase of'smoke tube superheaters locatecl Vfl-ues :Of. enlarged diameterthe'rform of thezsteami header; according to the present invention presents the possibilities, especially -whem-thetfluesrare staggered, to retain superisimple eform E and extendin'g :intotsingle =flues. and yetconnecting their surrounded by the-two 55 U-shapecllateral chambers. -.-with their conweteandzsuperheated ends; to therheaderrin 75 such: a manner that the ewetfanct superheated ends of each'element are arranged in frontof eacheothen looking (at-them; sin I the r-directin ofitherlongitud-inal axis oi-the :boilerz This removes; the adifliculties ordinarily encountered--, in: finding? space" for connecting; the

super-heater ielement ends to the-steam cham- -heaterl elements-which ha'Vegtobe: secured, b

normal diameterthesuperheater 'elementsassociated with :anygiven- -.tierof fluesrcantbe grouped into twoaindepen'dent' groupslying iii-front oftheother away that for each group the wet and super- 1 heated ends and their points of attachment to the header lie in single plane in front of I each otherin such a manner that two like element ends are in the center. In addition to the compact arrangement and the small foreand-aft length of the header, theadvantage is secured that the means used to hold the ends to the steam chamber engage only like ends and therefore no leaks result from unequal expansion of the ends.

The drawings show vlews illustratingldifferent forms of the. invention. Figs. 1 to 3.. 'showa steam header applied to a superheater "located in flues'ofno'rmal diameter. Fig.'1 shows a front view'of the superheater'viewed from the smoke box, Fig. 2 is a longitudinal section on line 1-1 of Fig. 1, and Fig. 8 shows a top view ofthesteam header. l Figs. 4, 5 and 6 show views, corresponding respecf tiv'e'ly to Figs.- 1,2 and 3, of anotherform'of the superheater header applied to a superheater whose units extend into, enlarged flues.

Whereas the firsttwoforms showaI-steam header 1 having bridging pieces between the 'front and rear chambers,- Figs. 7 toll'rep'resent aso-called frame header. Figs. 7 to9 illustrate in three views corresponding to those of Figs. v4: to 6, a'superh'eat'er in enlarged flues, while Figs. 10 r and 1 1 show a modifica- "tion of this form. 'Fig. 12=illustrates the manner in which the central chamber is connected to the outer framechamber In the form of the invention illustrated in theFigs. 1 to 3 all smoke tubes 1 are occupied lby superheaterelements 2 whichiare so ar- Y ranged that the. superheater-elements belong- 'ing to any v'ertical row oi'flues aregath'ered "into two groups and B vyhicli liefo'ne in fIOIIllfOf the other'in the plane of the row of flues. In. each case three superheated and three saturated ends are connected by means "of the intermediate'chambers B Wh'ich are secured'tothe lower sideof the headeriby means of clamps 5and' the central bolts/6, in such amanner'that in each group of elements the saturated and superheated ends and their points of attachment and means of attachment lie one'in front of the other in the same plane. A common clamp 5 therefore,

engages only like elements, that is, either 'wet steam ends or superheated steam ends. The steam headerecomprises a central superheated steam. chamber 7 Wliichissjurrounded by the U-shaped saturated steam chambers. The-latter comprises two lateral chambers 8 which are connected to each other by means of the bridging piece 9. Saturated steam is 1" carried to the header by means of the connection 10 while the superheated steamleaves .for the engine'throughthe pipes 1 1'. The centralchamber7of the'steam header 4 can, therefore, be fabricated separately as may also be the lateral chambers 8; The connecting bridge 9 can be made'unitary' with-the said keys. 7

two chambers 8 or secured to them subse quently. I V v The advantages of a steam header corresponding to this invention are obtained not only when the header is placed in the upper part of thesmoke box as in the example described, but also'if the header is placed at the sides or in the lower part of the smoke box. Moreover, the saturated steam can be carried to the middle chamber 7 in which case the outer chambers 8 wouldbe'superheated 4 to Gthere is illustrated another form' ofthe header applied to a large tube superheater,

of saturated andsuperheated'steam ends 13,. Mare engaged by the'clamp 3 which is secured to the steam header by means of the centralbolt '6. The superheated steam is carried'away by means of the two lateral pipes 11. In other respects the arrangement isthesame-as that of the first example; The ;Y

advantage is here also present thatthe ends and the means-of securing them tothe header "can be accommodated without; elongating the header in" the longitudinal direction of the smoke box.

" In theheader corresponding to Figs. 7 to 12,;the lateral chambers 8 are 'given the shape of a frame-like housing surrounding the central chamber 7- on' all'sides' (see-FigsLS) and flues ,'thecentral chamber 7 being the satu- "rated chamber while in the form of Figs. 10 -an'd'11'the central chamber 7 is the superheat- 110 ed chamber. The outer frame-like chamber 8 rests by means of itsfianges 15 on thebrackets 16'inthe' smoke'box and the central chamber 7 is clamped to the frame-like chamber 8. For the latter purpose, the two acent walls of the two chambers arecquip'ped with upwardlv extending flanges 17 which are connected to each other by means of the wedge 18 and the setscrew19. I v =1 I claim:v

1. In a" superheater headerthe'combination of three parallel elongated chambers. thecentral one being entirely separate from the other two, bridging channels co nnectingthe ends of the other two an'dextending opposite the ends of the central chamber, flanges extending upward from'the' channels and from chambers 'Inthe form illustrated, the bolts .6pare given the form of studs and are screwed into the lower walls of the headers. In F1gs.

the ends of saidfirst chamber,-juxtaposed faces of said flanges being grooved, keys engaging said'groov'es, and set screws engaging 10) Figs. 7 to 9'show the use of this header 1 i in connection with: a superheater in enlarged In a locomotive superheater, header the combination of c three parallel: elongated 1" V chambers with flat lower faces lying in acoma man plane, the centralone being entirely s'ep- 5 arate from the other two, the outer two being connected byv bridging channels extending 7 across the ends of the central chamber, means to connect a pipe to the central header, means a t to connect a pipe to the outer headers, and

' m means adjus-tably to hold the chambers in their relative position. V VOLLALND. 

